Not at all that’s still really young! Babies develop at their own pace but I don’t think 9 months is anything to worry about
My two year old said nothing at that age and didn't really take off with language until 22 months. Now just over two and she doesn't stop!
Please don’t worry. 9 months is far too young.
No he’s still a baby! You’ve got almost an entire year before worrying about this. If they’re 19 months and not saying anything that’s when a doctor may recommend them for early intervention but some times it’s not until they’re 2